J- gilmore



(No Model.)

R. J. GILMORE. :SWIVEL JOINT FOR HOSE COUPLINGS.

. No. 244,446 Patnted July 19,1881.

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V Inventor.-

N, Ens. PholnLilMgwpher. WrlihFngM D4 C.

UNITED STATES ROBERT J. GILMORE, OF PROVIDENCE, RHODE ISLAND.

PATENT OFFICE.

SWIVEL-JOINT FOR HOSE-COUPLINGS.

SPECIFICATION forming part of Letters Patent No. 244,446, dated July 19,1881 Application filed March 19, 1880. (No model.) V i To all whom itmay concern Be it known that I, ROBERT J. GILMORE, of Providence, in theState of Rhode Island,have invented a new and useful Improvement inSwivel-Joints for Hose-Couplings, of which the following is aspecification.

My invention relates to an improvement in theswivel-joints ofhose-couplin gs and it consists in constricting the annularretainingshoulder of the cast-metal outer ringof the swivel upon andback of the corresponding annular shoulder of the hose-band, thusinterlockin g the two shoulders to form the swivel, and at the same timeimproving the quality of the metal by condensation.

Figure 1 is a partial view and longitudinal section, showing the twoparts of the coupling as first formed. Fig. 2 is a similar view, showingthe two parts of the coupling interlocked to form a swivel-joint.

In the accompanyingdrawings, Arepresents the swivel-rin g, and B theband to be attached to the end of the hose. The band B is provided withan annular shoulder, 12, made in proper position, as shown in Figs. 1and 2, and the swivel-ringA is first cast with an annular shoulder, a,in an inclined position, as shown in Fig. 1, so that the shouldera maybe passed entirely over the shoulder b, and thenthe swivel-ring A is tobe placed in a pressof suitable construction, operating from all sidesto constrict the ring and by compressing the metal force the shoulder ainto interlocking position with the shoulder b, as shown in Fig. 2, thusforming the desired swivel-joint.

Swivel-joints for hose-couplings have heretofore been made by formingthe two shoulders so that one would pass over the other, and thenexpanding the inner one by means of a tapering mandrel; but this methodhas proveddefectivc in practice, for the reason that the metalordinarily used for such couplings failsjto expand to the requireddegree without liability of cracking or breaking, whereas byconstriction the quality and strength of the metal will 4 be improved,and the swivel-j oint be as readily and as cheaply formed. 1 1

The constricted swivel-rings may be readily distinguished from allothers by the slight v crinkle upon the inner surface of the annular oshoulder resulting from compression.

I claim as my invention v 1. In the manufacture of swiveljoints ofhose-couplings, the method of improving the strength and quality of themetalrformi'ng the 55 outer portion thereof, which consists in firstforming the swivel-ring with an inclined annular shoulder and thenconstricting it into interlocking position with the shoulder of t ehose-band, substantially as described.

2. The combination, in a hose-couplin g, wit a tail-piece having aninternal hose-chamber and an external annular groove, of a swivel havingan internal inwardly projecting lip adapted to be forced into saidgroove in the 65 tail-piece.

ROBT. J. GILMORE.

Witnesses WENDEL BOURGUIGNON, WILBER MASON.

